And george brown walton



mm). N, LQGOOHEU.

PROCESS OF MANUFACTURING ELEGTROTYPE ROLLER S FOR IMITATING V E LEATHER AND OTHER MATERIALS. K 4 No. Z76,'Z77.- Patented May 1,1883.

.4 ZTORNEY;

p p UNIT D STATES PATENT OFFIQ NOAH L. coonnu, or BROOKLYN, n. Y .,ASSIGNOR To nrnsninqrinornr YOULE snows", on NEW roan, AND cnouen BROWN wAr/rou, on

BROOKLYN, J. Y., TRUSTEES,

. PROCESS or MANUFACTURING ELECTROTYBEROLLERS For IMITATING LEATHER AND OTHER MATERIALS. r r

SPECIFICATION forming part of Letters Patent No. 276,777,'dated May 1, 1883.

Materials; and I do hereby declare the follo wor; to be a full, clear, and exact description of m the invention, reference being had to them:-

companying drawings, which form part of this specification, in which- 1 Figure 1' is a side elevation of .a forming e 4 roll. Fig. 2is-alongitudinal section ot'leather tube, with backing or stifl'euing. Fig.6 is a srdeelevation of spiral electrode. Fig. 4 is a .view showing transverse section of leather tube with backing and end ofspiral electrode. Fig. 5 is a longitudinal section of completed 26 tubular electrotyped roller.

Efforts have been made heretofore to pro dnc'e,"by means of the deposition of copper 'upon molds of wax and other substances eleetrotypes of cylindrical form, the outer sur;

Q' -faces of which should be unbroken and seam less and contain an exact copy or design of the material or mold on which the deposit was "made; but-none prior to my invention have proved satisfactory. Flat electrotype-plates 30 have been .made by deposition upon leather and bent around a shaft or bar of metal,,-the -joiu t-being soldered and the whole soldered or cemented to said shaft or bar. Such method is objectionahlefor these reasons: first, that V 5 it is foundimpossible to make an accurate joint and one that will stand the pressure necessary {or embossing purposes second, ithas been fonnd-diificult, if not impossible, by such method to obtain a roller perfectly cylin- 40 drical in form. Again, attempts have been made toaccomplish the object soughtby using a mold of iron or other substance, the inner surface of which is circular in form and perfectly smooth,and which is made-in two parts,

the joints being atcach side and running from one end, to the other ofsaid' mold; the two parts of the mold being separated, each was lined with leather, (when the object to be imitated was-leather,) and the leather out along interior of the mold of sufficient thickness to by galvanic'action, which shall besolid in all- Application filed July 6, 1882. (No model.)

l the edge of the mold, so as to fit andyconr-gc pletelycoyer the interior of said mold when itstwo parts were joined, the grained surface of the leather being exposed 'to galvanic action in an electrolyte composed of a solution of sulphate of copper, acid, and water. This method is also objectionable for these reasons: first, because no skin of leather is of uniform thick'ness,and if a cylindrical-mold such as described be lined with it the deposit will take the form of the cavity formed by the leather, and not'of the cylindrical mold, and will present an uneven surface, corresponding to the variations in Ithethiekness of the leather in its different parts; second, in lining such cylindrical moldit is necessary tocause the back or ungrainedpart of the "leather to adhere to said; mold by means of heated was, pitch, cement, or similar suhstance,*and it is impos sible to obtain a perfectly-even coating. of the .7 secure] the adhesion of the leather, so that the unevenness of such adhesive coating is reproduced on the surface of the deposited roller .when completed; third, should the said adhesive substance fail to secure the leather to all parts of the interior-of the moldsuch portions as are not fastened will swell and warp in the solution and the eli'ects be reproduced in 'the deposits, the roller will notbe truly round, and by reason of the uuevenness of its surface aperfect impression of what was intended to be reproduced cannot be obtained, the face ofthe material will show in-someparts a bold and vigorous impression, while in other parts a slight impression or none whatever will be seen. The object of my invention is to produce a tubular electrotyp ed roller for the purpose specified, which shall be of copper or other metal the salts of which may be'decomposed its parts, perfectly round, and possessing none of the imperfectionsnoted above. Inorderto produce such a roller, Lprepa're the surface or:- the leather'or other material upon which iv de- 5 sire to'm ake the deposit so that it wilLresi-st the action ofthe acid in the solution? For this purpose theleather may be coated, or,ii' neces,

sary, saturated with a mixtureof wax and turpentine but anyother suitable materials may be employed. I metallize the surface as m .ordinary-electrotyping, so that it may more quickly' receive the deposit. I then cut the leather to the'proper size and shape and wind it spirally around a roller of iron or other substance of the desired size, which has been turned in a lathe to perfect accuracy, and the surface of which is perfectly smooth, the

- grained surface of the leather or other material next bind the leather in place by 'strip of coarse netting or other material hav,

being in contact withthe surface of said roller.

In the drawings, A represents the roller, and B the strip of leather or other material to be copied, \voundspirally around the same. I means of a iu'g open meshes, such binding-strip being shown at U. I then apply a stiffening substance ofparafline, gut'ta-percha,orother'equivalent material to the outside of the leather or other material by means of a'brush, or by causp'ing it to revolve in a trough containing the stiffening substance in solution or in a; melted state until a coating is obtained of sufficient thickness to prevent alteration of its form or shape. After such coating is thoro ghly dried or cooled I withdraw the metal or internal roller, leaving the leather or other material so incased in one piece without joints, the interior of which corresponds accurately in size and form to the surface of the roller upon which it was formed. The tube thus formed'is shown in Fig. 2, the letter D indicating the coating, (J the netting, and B the leather or other material'upon which the deposit is tobe made.

I next suspend in thetuhe so formed a metal-' lic electrode of spiral or corrugated form for the purpose of securing greater surface for the action of the electrolyte. My reasons ,for using an electrode of the form suggested are as follows; First, the surface of v a positive electrode should be not less than that of the material receiving the deposit, otherwise the deposit is not likely to'be good, more care is required,-and the electrolyte becomes weaker 5' second,- by the use of an electrode such as do scribed the surface thereof may be made to correspond as nearly as possible in area to the surface of the material 'receivin glthe deposit, while occupying a comparatively small space and subject to the action of the electrolyte onall its parts.

E in the drawings represents a spiralielectrode, for'which one of corrugated-form may be substituted as an eoplivalent.

ness is While I prefer the above described-form of electrode, still I do not .claim it as a necessary part of my invention. I

.Having inserted the electrode in the tube-,1 place the whole in a decomposition-tank containing the electrolyte, makethe proper connections with a galvanic battery or dynamoelectric machine, by the action of which the -metal' in solution is deposited upon the leather ..-or other after which the whole'is removed from the somaterial' to any required thickness,

lution, the leather or other material detached,

the outer surface of which is perfectly round, is placed in a lathe, the inside bored ontsmooth, and the tube made ofan even or uniform thickthen' driven on ametallic shaft, F, which is turuedto fit tightly; Ihe tubular roller may be keyed on said shaft, if desired or necessary.

By'the method above described as my invention electrotyped tubular rollers may be made of many sizes and designs, "and used in an ordinary embossing-press.

Ido not herein claim the product which rewmding a strip of leather or,

serti'ng a positive electrodein the formed tube of leather or other material andprodueing by galvanic action a metallic deposit on the in side of-the. latter; fifth, taking 0d the leather or other material exterior to the deposited metal; and, sixth, fitting the tube on ashaft,

. substantially as set forth.

In testimony that I claim the=foregoing l have hereunto set my hand this 5th day of J uly, 1882. NOAH nooonsu.

' Witnesses;

GEO. B.- WAL'.roN, Tacos DU 1301s.

and the newly-formed 'electrotyped roller F,

as I intend making said product first, applying a protective to be imitated on a roller or' 

